I've read so many people that had problems with their Impact that when I got mine I was really disappointed in the blemish on the breech, just had some kind of stain.
I shot the .30 Silver Impact that was in my hands anyway, and it was a tack driver out of the box. I've shot thousands of pellets down it, only thing I ever did was the hammer spring adjustment and ended up putting it back were it was. It's done 175yds of Long Ranger, it consistently trims golf tees at 50yds. If I'm doing my part it can punch the center out of bulls at 75yds w/ complete consistency. It's my never miss gun. I have to do my part, no question, but it's pretty easy to make very consistent shots.
I do have an Athlon Helos FFP scope, which IMHO is the cream of the bargain crop. It's no Vortex/Nikon, but I really like it. Mil of course.
It's only pushing 830-840 fps w/ a 50gr so I've contacted Ernest and he's got a whole host of upgrades that will be on the market soon. Claims of 950fps w/ the same pellet and no more air use (I get 2 side shot mags on 1 fill.)
I am VERY happy with my Impact. I have a bunch of nice stuff and the Impact is by far my favorite.
It has developed a slight leak lately that I need to fix. I guess that happens after 10+ tins of pellets. Peeps are saying the Breech Seal and it's like 1 2x2x1 o-ring to fix and a ten minute job.
I just wanted to throw out positive feedback since so many complain about their Impacts. Figured it needed some luv.